Rafael Nadal continued his quest for a third straight French Open

title with another straight-set win Saturday, while fellow top

seeds Andy Murray and David Ferrer also moved on to the

second week with comfortable third-round wins.Nadal is gunning

for a seventh title overall at Roland Garros and on Saturday

advanced with a 6-1, 6-3, 6-4 victory over Argentina's Eduardo

Schwank. The second-seeded Spaniard has yet to be seriously

tested, as he dropped just five games in the first round and four

in the second before Saturday's methodical triumph.

The fourth-seeded Murray cruised to a 6-3, 6-4, 6-4 win over

Colombia's Santiago Giraldo, while the sixth-seeded Ferrer

powered past Russian Mikhail Youzhny in a 6-0, 6-2, 6-2 rout.

Spaniard Marcel Granollers, also outlasted Frenchman Paul-

Henri Mathieu, 6-4, 6-4, 1-6, 4-6, 6-1.